Boosting Li3V2(PO4)3 cathode stability using a concentrated aqueous electrolyte for high-voltage zinc batteries

Cuixia Li; Wentao Yuan; Chi Li; Huan Wang; Liubin Wang; Yongchang Liu; Ning Zhang

doi:10.1039/d0cc08115a

Boosting Li₃V₂(PO₄)₃ cathode stability using a concentrated aqueous electrolyte for high-voltage zinc batteries

Chem Commun (Camb). 2021 Apr 29;57(35):4319-4322. doi: 10.1039/d0cc08115a.

Authors

Cuixia Li¹, Wentao Yuan¹, Chi Li¹, Huan Wang¹, Liubin Wang¹, Yongchang Liu², Ning Zhang³

Affiliations

¹ College of Chemistry & Environmental Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding 071002, China. ningzhang@hbu.edu.cn.
² Institute for Advanced Materials and Technology, University of Science and Technology Beijing, Beijing 100083, China. liuyc@ustb.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China.
³ College of Chemistry & Environmental Science, Key Laboratory of Analytical Science and Technology of Hebei Province, Hebei University, Baoding 071002, China. ningzhang@hbu.edu.cn and Key Laboratory of Advanced Energy Materials Chemistry (Ministry of Education), College of Chemistry, Nankai University, Tianjin 300071, China.

PMID: 33913950
DOI: 10.1039/d0cc08115a

Abstract

We demonstrate that the capacity decay and voltage drop issues of the Li3V2(PO4)3 cathode are significantly addressed by using a concentrated aqueous electrolyte based on Zn and Li salts. The resultant aqueous Zn//Li3V2(PO4)3 battery achieves a high output voltage of 1.75 V and a long lifespan with 82.3% capacity retention over 2000 cycles. Joint structural and spectroscopic characterizations reveal that this battery operates through Li+ (de)intercalation into the cathode along with Zn2+ plating/stripping at the anode.